Intraocular Pressure Changes during Femtosecond Laser-Assisted Cataract Surgery: A Comparison between Two Different Patient Interfaces

Table 2

Mean IOP data at the different study time points of the two groups.

Mean IOP data at the different study time points
Study time points	Group 1			Group 2
	Mean ± SD (mmHg)	value^1 (<0.01)	value^2(<0.01)	Mean ± SD (mmHg)	value^1 (<0.01)	value^2 (<0.01)	value^3 (<0.01)
Before suction	14.1 ± 0.4	1.0	—	13.8 ± 0.4	1.0	—	0.68
After vacuum	33.2 ± 1.1	<0.001	—	24.2 ± 1.4	<0.001	—	<0.001
After phaco	21.4 ± 0.9	<0.001	<0.001	20.2 ± 1.2	<0.001	0.67	0.395
1 day after	14.0 ± 0.4	1.0	<0.001	12.7 ± 0.3	1.0	<0.001	0.01
7 days after	13.9 ± 0.3	1.0	<0.001	13.2 ± 0.3	1.0	<0.001	0.09

Before suction: IOP measured before laser treatment; after vacuum: IOP measured just after vacuum turned off and suction ring removed on lying patients; after phaco: IOP measured after cataract surgery; 1 day after: IOP measured at 1 day after surgery; 7 days after: IOP measured at 7 days after surgery. value¹: statistical significance of IOP values compared to preoperative values; value²: statistical significance of IOP values compared to values obtained after suction phase; value³: statistical significance of the IOP difference between the two groups at each study time points. Group 1: liquid optics interface. Group 2: SoftFit™ Patient Interface.